1 /*- 2 * SPDX-License-Identifier: BSD-2-Clause-FreeBSD 3 * 4 * Copyright (c) 2019-2020 The FreeBSD Foundation 5 * 6 * This software was developed by Mark Johnston under sponsorship from 7 * the FreeBSD Foundation. 8 * 9 * Redistribution and use in source and binary forms, with or without 10 * modification, are permitted provided that the following conditions are 11 * met: 12 * 1. Redistributions of source code must retain the above copyright 13 * notice, this list of conditions and the following disclaimer. 14 * 2. Redistributions in binary form must reproduce the above copyright 15 * notice, this list of conditions and the following disclaimer in 16 * the documentation and/or other materials provided with the distribution. 17 * 18 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND 19 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 20 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 21 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE 22 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 23 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 24 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 25 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 26 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 27 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 28 * SUCH DAMAGE. 29 */ 30 31 #include <sys/cdefs.h> 32 __FBSDID("$FreeBSD$"); 33 34 #include "opt_inet.h" 35 #include "opt_inet6.h" 36 37 #include <sys/param.h> 38 #include <sys/systm.h> 39 #include <sys/kernel.h> 40 #include <sys/module.h> 41 #include <sys/protosw.h> 42 #include <sys/socket.h> 43 44 #include <netinet/in.h> 45 #include <netinet/ip.h> 46 #include <netinet/ip_var.h> 47 #include <netinet/sctp.h> 48 #include <netinet/sctp_pcb.h> 49 #include <netinet/sctp_var.h> 50 #include <netinet/sctp_os_bsd.h> 51 52 #include <netinet6/ip6_var.h> 53 #include <netinet6/sctp6_var.h> 54 55 static int 56 sctp_module_load(void) 57 { 58 int error; 59 60 #ifdef INET 61 error = protosw_register(&inetdomain, &sctp_stream_protosw); 62 if (error != 0) 63 return (error); 64 error = protosw_register(&inetdomain, &sctp_seqpacket_protosw); 65 if (error != 0) 66 return (error); 67 error = ipproto_register(IPPROTO_SCTP, sctp_input, sctp_ctlinput); 68 if (error != 0) 69 return (error); 70 #endif 71 #ifdef INET6 72 error = protosw_register(&inet6domain, &sctp6_stream_protosw); 73 if (error != 0) 74 return (error); 75 error = protosw_register(&inet6domain, &sctp6_seqpacket_protosw); 76 if (error != 0) 77 return (error); 78 error = ip6proto_register(IPPROTO_SCTP, sctp6_input, sctp6_ctlinput); 79 if (error != 0) 80 return (error); 81 #endif 82 error = sctp_syscalls_init(); 83 if (error != 0) 84 return (error); 85 return (0); 86 } 87 88 static int __unused 89 sctp_module_unload(void) 90 { 91 92 (void)sctp_syscalls_uninit(); 93 94 #ifdef INET 95 (void)ipproto_unregister(IPPROTO_SCTP); 96 (void)protosw_unregister(&sctp_seqpacket_protosw); 97 (void)protosw_unregister(&sctp_stream_protosw); 98 #endif 99 #ifdef INET6 100 (void)ip6proto_unregister(IPPROTO_SCTP); 101 (void)protosw_unregister(&sctp6_seqpacket_protosw); 102 (void)protosw_unregister(&sctp6_stream_protosw); 103 #endif 104 return (0); 105 } 106 107 static int 108 sctp_modload(struct module *module, int cmd, void *arg) 109 { 110 int error; 111 112 switch (cmd) { 113 case MOD_LOAD: 114 error = sctp_module_load(); 115 break; 116 case MOD_UNLOAD: 117 /* 118 * Unloading SCTP is currently unsupported. Currently, SCTP 119 * iterator threads are not stopped during unload. 120 */ 121 error = EOPNOTSUPP; 122 break; 123 default: 124 error = 0; 125 break; 126 } 127 return (error); 128 } 129 130 static moduledata_t sctp_mod = { 131 "sctp", 132 &sctp_modload, 133 NULL, 134 }; 135 136 DECLARE_MODULE(sctp, sctp_mod, SI_SUB_PROTO_IFATTACHDOMAIN, SI_ORDER_ANY); 137 MODULE_VERSION(sctp, 1); 138